Since credentials can only contain integers, strings are converted by doing a SHA256. A type like date may be encoded as seconds/days since epoch which will be specified in the schema. Similarly other units are encoded as integers too. For more info have a look here

Hi,
I still do not see how is string ‘Alice’ encoded in 1139481716457488690172217916278103335? What I understood from above is that we convert Alice by SHA256 - which gives 3bc51062973c458d5a6f2d8d64a023246354ad7e064b1e4e009ec8a0699a3043. This converted in decimal gives 27034640024117331033063128044004318218486816931520886405535659934417438781507 which is in no way similar to 1139481716457488690172217916278103335.

The numbers are dummy values, so Alice would hash to 27034640024117331033063128044004318218486816931520886405535659934417438781507. That must have been done for readability, a note should have been left mentioning the redaction or maybe the redaction was not necessary at all.